Longest word ever in the dictionary

Guest wrote:

one of the only phrases in the english language which contains all the letters of the english language is: the quick brown fox jumps over the lazy dog

It has the letter 'e' repeated in it but theoretically it is correct

Guest wrote:

The longest word in the dictionary containing no letter more than once is "smiley." (There is a mile between the first and last letter.) Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch. This name is given in full on thepeople do no However, there is a place with an even longer name in New Zealand. It is the name of a hill. Here it is: Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiw en uaitnatahu. Longest disease is pneumonoultramicroscopicsilicovolcanokoniosis, defined by the OED as "a factitious word alleged to mean 'a lung disease caused by the inhalation of very fine silica dust' but occurring chiefly as an instance of a very long word. However, the longest official word ever (1,913 letters) is the term for the formula C1289H2051N343O375S8 And it is spelled: Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylgl utamylarginyllysyglutamylgycylalanylphenylalanylvalylprolylphenylalanylvalylthreonylleucylgl ycylaspartylprolylglycyllisoleucylglutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleu cylisoleucylglutamylalanylglycylalanylaspartylalanylleucylglutamylleucylglycylisoleucylprolylph enylalanylserylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleucylglutaminylaspara ginylalanylthreonylleucylarginylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalanylgl utaminylcysteinylphenylalanylglutamylmethionylleucylalanylleucylisoleucylarginylglutaminyllys ylhistidylprolylthreonylisoleucylprolylisoleucylglycylleucylleucylmethionyltyrosylalanlylasparagi nylleucylvalylphenylalanylasparaginyllysylglycylisoleucylaspartylglutamylphenylalanyltyrosylal anylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylsrylvalylleucylvalylalanylaspartylv alylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleu cylarginylhistidylasparaginylvalylalanylprolylisoleucylphenylalanylisoleucylcysteinylprolylprolyl aspartylalanylaspartylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylseryltyrosylg lycylarginylglycyltyrosylthreonyltyrosylleucylleucylserylarginylalanylglycylvalylthreonylglycylal anylglutamylasparaginylarginylalanylalanylleucylleucyllysylglutamyltyrosylasparaginylalanylal anylprolylprolylleucylglutaminylglycylphenylalanylglysylisoleucylserylalanylprolylaspartylgluta minylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylgl ycylserylalanylisoleucylvalyllysylisoleucylisoleucylglutamylglutaminylhistidylasparaginylisoleuc ylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylvalylgluta minylprolylmethionyllysylalanylalanylthreonylarginylserine